CN111610386A - Method for calculating service life of surge protector - Google Patents
Method for calculating service life of surge protector Download PDFInfo
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- CN111610386A CN111610386A CN201910689353.XA CN201910689353A CN111610386A CN 111610386 A CN111610386 A CN 111610386A CN 201910689353 A CN201910689353 A CN 201910689353A CN 111610386 A CN111610386 A CN 111610386A
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- 230000001012 protector Effects 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 25
- 208000025274 Lightning injury Diseases 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
Abstract
The invention discloses a method for calculating the service life of a surge protector, which comprises the following steps: acquiring the temperatures X0 and X1 of the current working state of the surge protector in real time; counting the duration T0 and T1 of the surge protector in the current working state in real time; and judging whether the surge protector is in a normal working state or not according to the working temperature and the duration time of the surge protector. Compared with the prior art, the method for calculating the service life of the surge protector adopts various calculation methods to calculate the service life of the SPD comprehensively, and when the service life of the SPD is about to reach, an alarm is sent to remind a user of treatment such as replacement, so that lightning damage of protected equipment is effectively avoided.
Description
Technical Field
The invention relates to the technical field of lightning protectors, in particular to a method for calculating the service life of a surge protector.
Background
The current lightning stroke phenomenon is inevitable, and in order to protect a lot of electrical equipment from being damaged by lightning strokes, lightning stroke surge protectors SPDs, such as a power supply SPD, a signal SPD, a video SPD and the like, are installed at the front ends of various circuits. When lightning strike current passes through the SPD in the using process, the self lightning protection capability can be lost due to chemical action, the time is long, and the SPD loses the protection effect on the lightning strike after a certain accumulated amount is reached. The service life of the SPD is over the shelf life, and the lightning protection effect is lost. SPDs also cause failure of lightning protection if they are working ill. If a failed SPD still works on line, the protected equipment is inevitably damaged by thunder, thereby causing great loss to production work.
Disclosure of Invention
The invention aims to provide a method for calculating the service life of a surge protector, which solves the technical problem of potential safety hazard caused by the fact that the service life of the existing surge protector cannot be detected.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the embodiment provides a method for calculating the service life of a surge protector, which comprises the following steps:
acquiring the temperatures X0 and X1 of the current working state of the surge protector in real time;
counting the duration T0 and T1 of the surge protector in the current working state in real time;
judging whether the surge protector is in a normal working state or not according to the working temperature and the duration time of the surge protector, and starting an alarm when any one of the following conditions is met:
if X0< lower limit of alarm temperature and duration time is longer than appointed time T0;
if X0> alarm upper temperature limit and the duration is longer than the appointed time T0;
if X1 is less than the alarm ultralow temperature lower limit and the duration is longer than the appointed time T1;
if the X1 is greater than the alarm ultrahigh temperature upper limit and the duration is greater than the appointed time T1;
wherein, | X0| < | X1|, | T0| > | T1 |.
The embodiment also provides a method for calculating the service life of the surge protector, which comprises the following steps:
acquiring floor drain current values I0, I1 and I2 of the surge protector in the current working state of the surge protector in real time;
counting the duration T2 and T3 of leakage current of the surge protector in the current working state in real time;
judging whether the floor drain is in a normal working state or not according to the current value and the duration time of the floor drain of the surge protector, and starting an alarm when any one of the following conditions is met:
if I0 is less than the alarm leakage current lower limit and the duration is longer than the appointed time T2;
if I0 is greater than the alarm leakage current upper limit and the duration is greater than the appointed time T2;
if I1 is less than the alarm super-leakage current lower limit and the duration is more than the appointed time T3;
if I1 is greater than the alarm super-leakage current upper limit and the duration is greater than the appointed time T3;
when I2 is 0;
wherein, | I0| < | I1|, | T2| > | T3 |.
The embodiment provides a method for calculating the service life of a surge protector, which comprises the following steps:
acquiring the current use date Rd of the current surge protector;
obtaining the manufacturing date Md, the quality guarantee period days S1 and the early warning days S0 of the current surge protector;
judging whether the surge protector is in a normal working state or not according to the using date, the manufacturing date, the quality guarantee period days and the early warning days of the surge protector, and giving an alarm if the surge protector meets (Rd-Md) > (S1-S0); where Rd is the date of operation, Md is the date of manufacture, S1 is the number of days of shelf life, and S0 is the number of days of early warning.
The embodiment provides a method for calculating the service life of a surge protector, which comprises the following steps:
acquiring lightning strike current Di of the current surge protector subjected to lightning strike;
acquiring the number of times of lightning impact suffered by the current surge protector;
according to the lightning current and the number of times of the surge protector which is subjected to lightning impulse, whether the surge protector is in a normal working state is judged, and if the conditions are met: (Di · β)) > Ze then alarm; where Di is the impact strength per lightning stroke, i is the number of times, beta is the damage factor, and Ze is the rated lightning strike resistance value.
Compared with the prior art, the method for calculating the service life of the surge protector adopts various calculation methods to calculate the service life of the SPD comprehensively, and when the service life of the SPD is about to reach, an alarm is sent to remind a user of treatment such as replacement, so that lightning damage of protected equipment is effectively avoided.
Drawings
Fig. 1 is a flow chart of a first embodiment of the method of calculating the service life of a surge protector of the present invention.
Fig. 2 is a flow chart of a second embodiment of the method of calculating the service life of a surge protector of the present invention.
Fig. 3 is a flow chart of a third embodiment of the method of calculating the service life of a surge protector of the present invention.
Fig. 4 is a flow chart of a fourth embodiment of the method of calculating the service life of a surge protector of the present invention.
Detailed Description
The invention will be further elucidated with reference to the drawing.
Referring to fig. 1, in a first embodiment, the method for calculating the service life of a surge protector includes the following steps:
s101, acquiring the temperatures X0 and X1 of the current working state of the surge protector in real time;
s102, counting the duration T0 and T1 of the surge protector in the current working state in real time;
s103, judging whether the surge protector is in a normal working state or not according to the working temperature and the duration time of the surge protector, and starting an alarm when any one of the following conditions is met:
if X0< lower limit of alarm temperature and duration time is longer than appointed time T0;
if X0> alarm upper temperature limit and the duration is longer than the appointed time T0;
if X1 is less than the alarm ultralow temperature lower limit and the duration is longer than the appointed time T1;
if the X1 is greater than the alarm ultrahigh temperature upper limit and the duration is greater than the appointed time T1;
wherein, | X0| < | X1|, | T0| > | T1 |. For example, the temperature is 81 ℃, the duration is 10 minutes or the temperature is 121 ℃, and the alarm is given for the duration of 2 minutes.
Referring to fig. 2, in a second embodiment, the method for calculating the service life of the surge protector includes the following steps:
s201, acquiring floor drain current values I0, I1 and I2 of the surge protector in real time under the current working state of the surge protector;
s202, counting the duration T2 and T3 of leakage current of the surge protector in the current working state in real time;
s203, judging whether the floor drain is in a normal working state or not according to the current value of the surge protector to the floor drain and the duration time of the current value, wherein an alarm is started when any one of the following conditions is met:
if I0 is less than the alarm leakage current lower limit and the duration is longer than the appointed time T2;
if I0 is greater than the alarm leakage current upper limit and the duration is greater than the appointed time T2;
if I1 is less than the alarm super-leakage current lower limit and the duration is more than the appointed time T3;
if I1 is greater than the alarm super-leakage current upper limit and the duration is greater than the appointed time T3;
when I2 is 0;
wherein, | I0| < | I1|, | T2| > | T3 |.
For example: the leakage current is 20mA, the duration is 10 minutes or 100mA, and the alarm can be given after the duration is 2 minutes. When the leakage current I2 is equal to 0, the SPD is disconnected to the ground, and no lightning protection is performed.
Referring to fig. 3, in a third embodiment, the method for calculating the service life of the surge protector includes the following steps:
s301, acquiring the current use date Rd of the current surge protector;
s302, acquiring the manufacturing date Md, the quality guarantee period days S1 and the early warning days S0 of the current surge protector;
s303, judging whether the surge protector is in a normal working state or not according to the using date, the manufacturing date, the quality guarantee period days and the early warning days of the surge protector, and giving an alarm if the surge protector meets (Rd-Md) > (S1-S0); where Rd is the date of operation, Md is the date of manufacture, S1 is the number of days of shelf life, and S0 is the number of days of early warning.
Referring to fig. 4, in a fourth embodiment, the method for calculating the service life of the surge protector includes the following steps:
s401, acquiring lightning strike current Di of the current surge protector subjected to lightning strike;
s402, acquiring the number of lightning impulse suffered by the current surge protector;
s403, judging whether the surge protector is in a normal working state according to the lightning current and the number of times of the surge protector subjected to lightning surge, and if the conditions are met: (Di · β)) > Ze then alarm; where Di is the impact strength per lightning stroke, i is the number of times, beta is the damage factor, and Ze is the rated lightning strike resistance value.
After the SPD is subjected to lightning surge, due to chemical factors, the protection capability of the protection element of the SPD is damaged to a certain extent according to the magnitude of lightning current, so that the lightning protection capability of the SPD is reduced. When the lightning stroke is accumulated to a certain threshold value, the SPD loses the lightning stroke protection capability. The damage condition of the SPD during each lightning stroke impact is accumulated according to the lightning stroke current intensity and the damage factor, when the total damage value is larger than the rated lightning stroke resistance value, the SPD loses the protection effect on the lightning stroke, and a user can be timely reminded to replace the SPD according to the judgment, so that the safe operation of protected equipment is ensured.
Compared with the prior art, the method for calculating the service life of the surge protector adopts various calculation methods to calculate the service life of the SPD comprehensively, and when the service life of the SPD is about to reach, an alarm is sent to remind a user of treatment such as replacement, so that lightning damage of protected equipment is effectively avoided.
The above-mentioned embodiments are merely preferred examples of the present invention, and not intended to limit the present invention, and those skilled in the art can easily make various changes and modifications according to the main concept and spirit of the present invention, so that the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A method of calculating the service life of a surge protector, comprising the steps of:
acquiring the temperatures X0 and X1 of the current working state of the surge protector in real time;
counting the duration T0 and T1 of the surge protector in the current working state in real time;
judging whether the surge protector is in a normal working state or not according to the working temperature and the duration time of the surge protector, and starting an alarm when any one of the following conditions is met:
if X0< lower limit of alarm temperature and duration time is longer than appointed time T0;
if X0> alarm upper temperature limit and the duration is longer than the appointed time T0;
if X1 is less than the alarm ultralow temperature lower limit and the duration is longer than the appointed time T1;
if the X1 is greater than the alarm ultrahigh temperature upper limit and the duration is greater than the appointed time T1;
wherein, | X0| < | X1|, | T0| > | T1 |.
2. A method of calculating the service life of a surge protector, comprising the steps of:
acquiring floor drain current values I0, I1 and I2 of the surge protector in the current working state of the surge protector in real time;
counting the duration T2 and T3 of leakage current of the surge protector in the current working state in real time;
judging whether the floor drain is in a normal working state or not according to the current value and the duration time of the floor drain of the surge protector, and starting an alarm when any one of the following conditions is met:
if I0 is less than the alarm leakage current lower limit and the duration is longer than the appointed time T2;
if I0 is greater than the alarm leakage current upper limit and the duration is greater than the appointed time T2;
if I1 is less than the alarm super-leakage current lower limit and the duration is more than the appointed time T3;
if I1 is greater than the alarm super-leakage current upper limit and the duration is greater than the appointed time T3;
when I2 is 0;
wherein, | I0| < | I1|, | T2| > | T3 |.
3. A method of calculating the service life of a surge protector, comprising the steps of:
acquiring the current use date Rd of the current surge protector;
obtaining the manufacturing date Md, the quality guarantee period days S1 and the early warning days S0 of the current surge protector;
judging whether the surge protector is in a normal working state or not according to the using date, the manufacturing date, the quality guarantee period days and the early warning days of the surge protector, and giving an alarm if the surge protector meets (Rd-Md) > (S1-S0); where Rd is the date of operation, Md is the date of manufacture, S1 is the number of days of shelf life, and S0 is the number of days of early warning.
4. A method of calculating the service life of a surge protector, comprising the steps of:
acquiring lightning strike current Di of the current surge protector subjected to lightning strike;
acquiring the number of times of lightning impact suffered by the current surge protector;
according to the lightning current and the number of times of the surge protector which is subjected to lightning impulse, whether the surge protector is in a normal working state is judged, and if the conditions are met: (Di · β)) > Ze then alarm; where Di is the impact strength per lightning stroke, i is the number of times, beta is the damage factor, and Ze is the rated lightning strike resistance value.
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| CN201910689353.XA CN111610386A (en) | 2019-07-29 | 2019-07-29 | Method for calculating service life of surge protector |
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| CN201910689353.XA CN111610386A (en) | 2019-07-29 | 2019-07-29 | Method for calculating service life of surge protector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113110728A (en) * | 2021-03-19 | 2021-07-13 | 厦门赛尔特电子有限公司 | Monitoring method and system thereof |
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| CN105738724A (en) * | 2016-01-29 | 2016-07-06 | 上海雷迅防雷技术有限公司 | Surge protection device detection and analysis method and system |
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| CN113110728A (en) * | 2021-03-19 | 2021-07-13 | 厦门赛尔特电子有限公司 | Monitoring method and system thereof |
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Application publication date: 20200901 |